IT38010: MICROSOFT EXCHANGE DAG AND MICROSOFT SQL AAG FORCE A BASE BACKUP AFTER FAILOVER EVEN WHEN THERE IS A PRIOR BASE BACKUP

APAR status

• Closed as program error.

Error description

• Microsoft Exchange DAG and Microsoft SQL AAG force a base backup
  due to missing metadata information after failover, even when
  there is a prior base backup before the failover. Windows
  application event viewer log shows following message for
  Exchange database full backup as an example:
  
  Information <date-time> MSExchangeRepl 2090 Action "Database:
  <exchange-db>\<exchange-server>Mailbox server: <exchange-server
  host> A failover or switchover occurred. Database
  <exchange-db>\<exchange-server> will be mounted with no data
  loss."
  
  Information <date-time> MSExchangeRepl 2110 Exchange VSS Writer
  The Microsoft Exchange VSS Writer instance
  xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx has successfully prepared
  for a full or a copy backup of database '<exchange-db>'. The
  following database will be backed up: <exchange-db>.
  
  Sample steps are as following:
  
  1. AG1 runs as base backup
  2. AG1 runs as incremental backup
  3. AG2 runs as base backup
  4. AG2 runs as incremental backup
  5. AG1 is a forced base backup
  
  Versions affected: 10.1.*
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * IBM Spectrum Protect Plus levels 10.1.*                      *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * see Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply fixing level when available. This problem is currently *
  * projected to be fixed IBM Spectrum Protect Plus level        *
  * 10.1.9. Note that this is subject to change at the           *
  * discretion of IBM.                                           *
  ****************************************************************
  

Problem conclusion

• Fixed an issue with processing metadata associated with the
  source volumes for the databases. After applying the fix a fail
  over will not cause a base backup when an incremental backup is
  possible.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Modules/Macros

• Apps     Exchange
  

Fix information

• Fixed component name

  SP PLUS

• Fixed component ID

  5737SPLUS

Applicable component levels